From Teleread.org: Bookeen, maker of the Cybook, has opened up Ubibooks. The new e-book store is starting out with several thousand books with texts available in five languages (English, French, German, Spanish and Italian).

And here is my take why this e-book store is going to fail:
1. E-books are offered only in one format, Mobipocket, which is one of the most-restrictive (e-books only run on the device you bought it for) and unusable (incompatible with any other e-book software reader).
2. So-called "best 100 promotions" lure you into buying DRM-infested books that are publicly and freely available DRM-free at Gutenberg.

I think you're maybe being a bit unfair. From a quick look at the site, it seems to have a good selection and reasonable prices. As for Mobipocket, well it's certainly better than Adobe in terms of usability and maybe a bit less problematical as far as the DRM is concerned. Of all the readers, I guess eBookReader has the easiest DRM functionality.

Ok,
let's try to be fair here for a second. I think the main reason why e-book stores like eReader.com and now also Ubibooks try to sell public domain books as "promotions" is because they usually don't have any other options. It is the publishers who have to OPEN THEIR EYES and who have to work hand-in-hand with e-book stores to attract new customers. We have a typical catch-22 situation here.

Another thing to bear in mind is that there are many users of PDAs who don't want to have to assemble their own ebook from a Gutenburg text. They're willing to pay a little bit of money (and it's usually not that much) to have a ready-made book. Anything that helps these firms be profitable must be a good thing, or they'll go out of business. Myself, if a book's out of copyright I always go to Gutenburg and convert to iSilo - by far the best reading experience.

OK, about Ubibooks. Well, not long ago we were discussing about the NY Public Library using the Mobipocket format to lend eBooks. Craig said that "... Mobipocket does appear to be the platform of choice for all the libraries [he had] checked out yet."
So maybe if the Mobipocket format is thriving, the guys at eReader are really the ones to blame.

Ubibooks proposes 20,000 titles in five languages and in more than 50 categories, from science-fiction to classical literature. All ebooks are downloadable 7 days a week and 24 hours a day.

Thanks to “Mobipocket Reader”, ebooks available from Ubibooks can be read on the largest variety of platforms: PocketPC, Palm, Smartphone, PC or Cybook.

“On Ubibooks, you will find publishers as prestigious as Random House or Simon & Schuster and authors of best-sellers such as Dan Brown or Stephen King. Available at any time of the day or night, Ubibooks catalogue allows avid but also occasional readers to discover new writers and new titles at the best price,” explains Michaël Dahan, cofounder of Bookeen.